Re: File search progress: database review and question on triggers

["Ludovic Courtès" <ludo@gnu.org>]

Pierre Neidhardt <mail@ambrevar.xyz> skribis:

> Ludovic Courtès <ludo@gnu.org> writes:
>
>> It first tries ‘query-path-info’, which succeeds if the store item is
>> available and contains info about its size, references, and so on.
>>
>> When ‘query-path-info’ fails, it falls back to
>> ‘query-substitutable-path-info’, which allows it to obtain the same
>> information for substitutes.  Thus, it doesn’t need to have the store
>> item available locally.
>
> So we could do the same with `guix filesearch`:
>
> - First try the entry in the database.
>
> - If not there, try query-path-info and if it succeeds, populate the
>   database.
>
> - If query-path-info does not succeed, try our new
>   query-substitutable-filesearch-info.
>
> That would work, no?

Sure, but it’s a big change on the daemon size (you need this new RPC, a
new database, a way to update this database, presumably orthogonal to
substitutes (?), etc.)

A client-side approach (not involving guix-daemon) would be more readily
usable, though some of the questions above remain open.

Thanks,
Ludo’.